AD7740KRMZ

The AD7740KRMZ from Analog Devices is a low-cost, ultrasmall synchronous Voltage-to-Frequency Converter (VFC). It supports operation from a single 3.0 V to 3.6 V or 4.75 V to 5.25 V supply, consuming a low power of typically 0.9 mA. The device features an internal 2.5 V bandgap reference, which can be externally overdriven. The full-scale output frequency is synchronous with the external system clock, with a maximum input frequency of 1 MHz.

This VFC offers selectable high impedance buffered input and true –150 mV capability without a charge pump. The nominal input range is 0 to VREF. In buffered mode, the input range is 0.1 V to VDD – 0.2 V, while the unbuffered mode allows VIN to range from –0.15 V to VDD + 0.15 V. The AD7740KRMZ boasts 1% accuracy and 0.012% linearity.

Designed for ease of use and minimal external components, the AD7740KRMZ is suitable for applications such as isolation of high common-mode voltages, low-cost analog-to-digital conversion, battery monitoring, and automotive sensing. It is supplied in an 8-lead MSOP package, suitable for surface mounting.